A simple method for absolute assay of medical solution of
125
I is described
which takes advantage of the area in the coincident sum peak in the single crystal NaI (Tl) γ-ray spectrum. Using this method to various measurement conditions
we get accuracy within 1%.
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references
Nucl. Data Sheets , 7 , 5 , ( 1972 ).
J. S. Eldridge et al ., Nucleonics , 22 , 6 , 56 ( 1964 ).